Improvement in pneumatic signals



F. BOYD. PNEUMATIC-SIGNAL.

No. 193,474, Patentd July 24,1877.

WITNESSES.-

INVENTOR 6 7 M ww 7d UNITED STATES PATE 1 1* OFFICE.

FRANK BOYD, OF OSHKOSH, WISCONSIN.

IMPROVEMENT IN PNEUMATIC SIGNALS.

Specification forming part of Letters Patent No. 193,474, dated July 24,1877; application filed July 3, 1877.

To all whom it may concern.-

Be it known that I, FRANK BOYD, of Oshkosh, Winnebago county, Wisconsin,have invented certain new and useful Improvements in Pneumatic Alarms orSignals, of which the following is a clear, full, and exact description,reference being bad to the accompanying drawings, making a part of thisspecification, in which Figure 1 is a side view. tudinal section.

This invention relates to improvements in pneumatic alarms or signals,the object being to make a simple apparatus or alarm for hand use onsailing vessels, for farm use, 850. and the invention consists in thegeneral construc tion and arrangement of an air-pump, with a whistle orvibrator attached thereto, as will be hereinafter fully described.

In the drawings, A represents a metal tube or pump cylinder, supportedhorizon tally upon legs a, which are provided with holes a, whereby thecylinder can be secured upon the deck of a vessel or other convenientplace. B represents a piston fitting and playing within said tube orcylinder A, and 0 represents the piston-rod fitting and passing throughthe perforated head D of the tube or cylinder, and E the handle of thepiston-rod. F is a valve placed in the lower end of said tube orcylinder, and in front of the perforated head D. This valve admits theair to the cylinder, and is opened by pushing the piston-rod and pistonforward, and is closed by the pressure of the air when the piston isdrawn backward.

Fig. 2 is a longi- G is a pipe or tube communicating with the tube orcylinder near its lower and air-inlet end, and to this pipe or tube G isfastened the screw-threaded end of a hollow spindle,

of whistles given) the apparatus may be madeuseful for differentpurposes.

I am aware that various forms of pneumatic signals or alarms, consistingof an air-pump and a whistle or vibrator, are old, and such I do notclaim, broadly, as my invention; but

What I claim as new, and desire to secure by Letters Patent, is-

The herein-described pneumatic signal, consisting of the tube orcylinder A, having the perforated head D and valve F arranged in one endthereof, the piston B, piston-rod O, and whistle or vibrator K I b, theseveral parts constructed and relatively arranged as specified.

FRANK BOYD.

Witnesses Gums. SARAN, OHRIs. SARAN, Jr.

